Means for securing percussion-cap in cartridges.



.R. H. STRIBEGK. MEANS FOR SECURING PERCUSSION GAPS IN CARTRIDGES.

. UATION FILED MAY 25,1907- Patented Sept. 15, T1908 iUr - demonstratedUNITE STATES Agnn mes v RICHARD HERMANN STRIBECK, OF GRUNEWALD, NEARBERLIN, GERMANY.

MEANS FOR SECURING PERCUSSION-CAPS IN CARTRIDGES.

Specification of Letters Patent.

Patented Sept. 15, 1908.

Application fiIed May 25, 190.7. Serial No: 375,642.

T all whom it may concern:

Be it known that I, STRIBECK, engineer, citizen of P siding atGrunewald, near Berlin, have invented new and russia, re- Germany,useful Improved cans for Securing Percussion-Caps in *Care tridges, ofwhich the following is a specification.

The invention has reference to an improved-means of fixing and roundsthe detonator and also surrounds the ignition space, together with thebottom and the anvil, is formed of one piece of metal.

In accordance with the usual means the the friction between itscylindrical outer face and the iiiterior bore of the cartridge caseprovided for the reception of the percussion cap. This friction isinvariably produced by soforming the percussion cap that its diameter 18somewhat larger than the said bore of the cap cl'iainberand is pressedinto the latter. The joint between the percussion cap and the capchamber is intended to be produced by the pressure with which saiddetonator bears against the bore. Experience has however that with thisconstruction t e percussion cap does not always remain tight, owing totwo principal reasons. One of these consists in the expansion of the capchamber. This occurs almost rulewith light metals and light alloys (theto this expansion tl position of the specific weight of which is lessthan 4 owing to their small degree oi hardness. ()win ic percussion capbe comes loose, flowibetweenthe same and the cap chamber and causeerosion. other cause of lack of tightness is the sunk percussion cap inthe capchamber. On firing the percussion cap is displaced in the bore ofthe cap chamber by the gas pressure, until it bears against the face ofthe breech bolt or block of the gun. Owing to this movement and thesimultaneous deformation of the bottom of the percussion cap bythe gaspressure on the one hand and the firing pin on the other, the joint isdestroyed.

The object of the present invention is to means for 'preventihg thepenetrachamber with a projection against which the j' that this hearingmay be maintained RICHARD HERMANN I spon ding view showing .portiOn Ofthe portion of during percussion cap must be prevented from displacementunder the influence of the gas pressure. This object is attained owin tothe fact that parts of the bottom of the percussion cap, or projectionsformednpon the same, rest against correprojections within the interiorof the cap' chamber. The present invention, therefore, overcomes thedefects referred to above which as explained give rise to loosen-. ingof the percussion cap and the escape of gases between the latter and thecap chamb r,

In order that the invention may be clearly understood reference may behad to the accompanying drawing in which- Figure 1 is asectional view ofthe cartridge head with the cap therein-Fig. 2 a like a modiiication iig. 22 isa of the cartridge head shown the insertion of the ca )-Fig.

sectional view in Fig. 1 before 3 is a sectional view showing a part ofthe breech block which has a special new f()l'lll. lg 5, 6 and 7 aresectional views of further modifications. i

As already stated, the edge 1 of the detonator 2 bears against acorresponding projection-3 within. the cartridge 4. In Fig. 1 byimpressing a circular channel 5 in the head of the cartridge, a portionof the cartridge case is compressed in front of the outward percussioncap 2] The construction shown in Fig. 2 differs from'that shovn in Fig.1 owing to the fact that, the head or end face of the cartridge does nothave a channel formed therein. The head 6 projecting in front of theoutward the percussion cap is produced by forming the cartridge casewith a raised edge surrounding the bore which receives the per cussioncap as shown in Fig. 2, and forming down this. edge after the insertionthereof. The construction shown in Fig. 2 is preferable, in carrying outthe invention, to that in Fig. 1, as in this casethe bottom of the caseis not weakened by the formation of a channel. he constructionsillustrated in Figs. 3 and 4 are still more complete than that shown inFig. 2, as in these in the first place the head of the cartridge casedoes not bear upon the face of the breech bolt or block 7 completely butonly with an annular surface Fig. 3) surrounding the exposed surface ofthe percussion cap said annular surface view of a diil'erent-form of Icartridge li(. l(l.l l. 4 is a like specially against the face, of thebreech belt or block By this means the percussion cap is pressed in thedirection of the axis from both sides and thus the pressure on the jointof the detonator is still further increased. As the pressure of thejoint insee Fig. 4.

creases in accordance with the pressure at hung a reliable JOIDiisobtained, eveir with high gas pressures.

The forgoing explanations will render Figs. 5 to 7 intelligible. Thesefigures show different forms of: caps, for instance, Fig. 5 shows a caphaving a ilange 5 engaging a recess in the cartridge head. Fig. 6 showsthe llange in a. ditterent location and Fig. 7 shows a cap having areduced portion against which the ease engages.

The invention is also applicable to percussion caps which are connectedto the cap chamber by screwing or otherwise.

l l l l l l l l laving now particulartv described and ascertained thenature oi my said invention and in what manner the same is formed Ideclare that what I claim 1s:-

1 A cartridge having a cap chamber in its head, an. annular shoulderformed. in said chamber, a cap having its inner edge adapted to bearagainst said shoulder, and a projection on the cartridge head ada )tedto bear on a. partof' the cap head to hold the cap in the chamber.

2. A cartridge having av chamber in its head, an annular shoulder in.said chamber, a cap adapted to enter said chamber and to have itsinneredge rest against said shoulder, and an. annular raised portion on thecartridge surrounding said chamber, said portion bcing adapted to beforced over on the cap to hold the same in place.

.ln testimony whereof i have signed my name to this specilicatioi'i. in,the presence oi:

two subscribing witnesses.

ltltlllliltll liERMANN Slltilil'iUlt.

'\\'itnesses: I Wonnnuan iiAlJP'l, liicxmt l lasrnn.

to be per-

